Rasa课程、Rasa培训、Rasa面试、Rasa实战系列之FormAction（三）
aioresponses模拟ClientSession发出的aiohttp请求
class aioresponses(object):
"""Mock aiohttp requests made by ClientSession."""
_matches = None # type: Dict[str, RequestMatch]
_responses = None # type: List[ClientResponse]
requests = None 
